The Brain, Consciousness & Illusion of Truth

...How do we know that something is true or false? How does the brain discern the truth? What kind of mechanism allows the brain to interpret the information received in the shape of electrical and chemical impulses to which it is constantly exposed? Is it the case that our brains are endowed with appropriate algorithmic rules for discriminating between truth and untruth, alongside certain rules for handling, say, optical information? Is it the case that the brain produces illusions of trut...